Integration tests fail on xenial

[Andreas Hasenack]

The current charm store (cs:trusty/landscape-server-14) integration tests when run on a xenial machine:
$ time make integration-test
Checking for ...
juju-test: installed
Tree is up to date at revision 15 of branch bzr+ssh://bazaar.launchpad.net/~landscape/landscape-charm/bundles-stable
juju test --set-e -p LS_CHARM_SOURCE,JUJU_HOME,JUJU_ENV,PG_MANUAL_TUNING -v --timeout 3000s
juju-test INFO : Starting test run on local using Juju 1.25.5
juju-test DEBUG : Loading configuration options from testplan YAML
juju-test DEBUG : Creating a new Conductor
juju-test.conductor DEBUG : Starting a bootstrap for local, kill after 300
juju-test.conductor DEBUG : Running the following: juju bootstrap -e local
Bootstrapping environment "local"
Starting new instance for initial state server
Building tools to upload (1.25.5.1-xenial-amd64)
Installing Juju agent on bootstrap instance
[sudo] password for andreas:
Logging to /home/andreas/.juju/local/cloud-init-output.log on remote host
Installing package: curl
Installing package: cpu-checker
Installing package: bridge-utils
Installing package: rsyslog-gnutls
Installing package: cloud-utils
Installing package: cloud-image-utils
Installing package: tmux
Bootstrapping Juju machine agent
Starting Juju machine agent (juju-agent-andreas-local)
Bootstrap agent installed
vmwarestack -> local
Bootstrap complete
juju-test.conductor DEBUG : Waiting for bootstrap
juju-test.conductor DEBUG : Still not bootstrapped
juju-test.conductor DEBUG : Running the following: juju status -e local
juju-test.conductor DEBUG : State for 1.25.5: started
juju-test.conductor.01-basic DEBUG : Running 01-basic (tests/01-basic)
Running tests at level 1
Running layers.OneLandscapeUnitLayer tests:
  Set up layers.OneLandscapeUnitLayer 2016-07-20 16:35:29 Starting deployment of local
2016-07-20 16:35:29 Deploying services...
2016-07-20 16:35:29 Deploying service haproxy using cs:trusty/haproxy-16
2016-07-20 16:35:35 Deploying service landscape-server using /tmp/charmtumykgym/trusty/store
2016-07-20 16:35:39 Deploying service postgresql using cs:trusty/postgresql-40
2016-07-20 16:35:45 Deploying service rabbitmq-server using cs:trusty/rabbitmq-server-43
2016-07-20 16:39:57 Adding relations...
2016-07-20 16:39:57 Adding relation landscape-server <-> rabbitmq-server
2016-07-20 16:39:58 Adding relation landscape-server <-> haproxy
2016-07-20 16:39:58 Adding relation landscape-server:db <-> postgresql:db-admin
2016-07-20 16:40:58 Exposing service 'haproxy'
2016-07-20 16:40:59 Deployment complete in 329.47 seconds
in 6 minutes 56.288 seconds.
  Running:
 test_bootstrap (basic.test_actions.ActionsTest)
 test_pause_resume (basic.test_actions.ActionsTest)Traceback (most recent call last):
  File "tests/01-basic", line 5, in <module>
    main()
  File "/home/andreas/charms/store/tests/helpers.py", line 594, in main
    run(args=args)
  File "/usr/lib/python3/dist-packages/zope/testrunner/__init__.py", line 27, in run
    failed = run_internal(defaults, args, script_parts=script_parts, cwd=cwd)
  File "/usr/lib/python3/dist-packages/zope/testrunner/__init__.py", line 44, in run_internal
    runner.run()
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 171, in run
    self.run_tests()
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 253, in run_tests
    self.skipped, self.import_errors)
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 422, in run_layer
    import_errors)
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 342, in run_tests
    test(result)
  File "/usr/lib/python3.5/unittest/case.py", line 648, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python3.5/unittest/case.py", line 619, in run
    result.stopTest(self)
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 850, in stopTest
    self.testTearDown()
  File "/usr/lib/python3/dist-packages/zope/testrunner/runner.py", line 775, in testTearDown
    layer.testTearDown()
  File "/home/andreas/charms/store/tests/layers.py", line 19, in testTearDown
    cls.environment.cleanUp()
  File "/usr/lib/python3/dist-packages/fixtures/fixture.py", line 125, in cleanUp
    return self._cleanups(raise_errors=raise_first)
TypeError: 'NoneType' object is not callable
juju-test.conductor.01-basic DEBUG :
juju-test.conductor.01-basic DEBUG : Got exit code: 1
juju-test.conductor.01-basic RESULT : ✘
juju-test.conductor INFO : Breaking here as requested by --set-e
juju-test INFO : Results: 0 passed, 1 failed, 0 errored
Makefile:43: recipe for target 'integration-test' failed
make: *** [integration-test] Error 1

real 9m5.878s
user 1m1.260s
sys 0m10.052s

For this run, I had LS_CHARM_SOURCE set to ppa:landscape/16.06

$ juju status --format=tabular
[Services]
NAME STATUS EXPOSED CHARM
haproxy unknown true cs:trusty/haproxy-16
landscape-server active false local:trusty/landscape-server-0
postgresql active false cs:trusty/postgresql-40
rabbitmq-server active false cs:trusty/rabbitmq-server-43

[Units]
ID WORKLOAD-STATE AGENT-STATE VERSION MACHINE PORTS PUBLIC-ADDRESS MESSAGE
haproxy/0 unknown idle 1.25.5.1 1 80/tcp,443/tcp,10000/tcp 10.0.3.17
landscape-server/0 active idle 1.25.5.1 2 10.0.3.150
postgresql/0 active idle 1.25.5.1 3 5432/tcp 10.0.3.68 Live master
rabbitmq-server/0 active idle 1.25.5.1 4 5672/tcp 10.0.3.74 Unit is ready

[Machines]
ID STATE VERSION DNS INS-ID SERIES HARDWARE
0 started 1.25.5.1 localhost localhost xenial
1 started 1.25.5.1 10.0.3.17 andreas-local-machine-1 trusty arch=amd64
2 started 1.25.5.1 10.0.3.150 andreas-local-machine-2 trusty arch=amd64
3 started 1.25.5.1 10.0.3.68 andreas-local-machine-3 trusty arch=amd64
4 started 1.25.5.1 10.0.3.74 andreas-local-machine-4 trusty arch=amd64

[Free Ekanayaka (free.ekanayaka)]

Tests pass in r368 and later:

https://ci.lscape.net/job/landscape-charm-test/